Support ContextClicks in empty areas of Table and TreeTable (#19130)

When the user clicks an empty area, the TableContextClickEvent will still
fire, but will have a null property.

Change-Id: I39303f1a72d072db09c4fe6df8141d6caf0764c2

1 files changed, 4 insertions, 2 deletions

diff --git a/server/src/com/vaadin/ui/Table.java b/server/src/com/vaadin/ui/Table.java
index cbc216661a..66fa257ac2 100644
--- a/server/src/com/vaadin/ui/Table.java
+++ b/server/src/com/vaadin/ui/Table.java
@@ -6420,7 +6420,8 @@ public class Table extends AbstractSelect implements Action.Container,
         /**
          * Returns the item id of context clicked row.
          * 
-         * @return item id of clicked row; <code>null</code> if header or footer
+         * @return item id of clicked row; <code>null</code> if header, footer
+         *         or empty area of Table
          */
         public Object getItemId() {
             return itemId;
@@ -6429,7 +6430,8 @@ public class Table extends AbstractSelect implements Action.Container,
         /**
          * Returns the property id of context clicked column.
          * 
-         * @return property id
+         * @return property id; or <code>null</code> if we've clicked on the
+         *         empty area of the Table
          */
         public Object getPropertyId() {
             return propertyId;